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Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 11 Documents
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Search results for , issue "Vol 28, No 2 (2024)" : 11 Documents clear
Analysis of The Relationship of Rework and Inventory to Waste in The Ciputra Hospital Surabaya Project Ferdiandika, Ahmad Fadhil; Nuciferani, Felicia Tria; Choiriyah, Siti; Harianto, Feri
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5924

Abstract

Currently, the construction sector is adopting the theory of production in the manufacturing industry, known as lean construction, to reduce waste and increase value. Last Planner System (LPS) has not been widely used and has good potential because the advantage of LPS is to identify a job along with obstacles to improve performance in a construction project. In the construction of Junior High School (SMP) Al-Falah, it has work obstacles due to erratic weather so that the project is delayed, the author conducts a field survey to analyze the actual progress in the field, LPS has work indicators / work flow to measure the extent to which work indicators can be realized properly, the LPS work flow are Master Plan, Phase Pull Planning, Lookahead Planning, Constraints Analysis, Shielding Production, and Percent Plan Complete (PPC) as a standard for measuring whether project productivity is realized properly or not. In this study, the results of the implementation using LPS on the Al-Falah Junior High School construction project show that the lowest PPC can be seen in week 7, which is 0% because there is no work achievement so that the work is delayed, while in week 16 it can be seen that PPC has increased dramatically to 96%. Then after averaging the PPC of 51% which means that LPS has not been able to increase the reliability of planning above 70%, (Ballard, 2000).
Thermal Analysis of Greenhouse Environment Using Computational Fluid Dynamics (CFD), Case Study in ITERA Drantantiyas, Nike Dwi Grevika; Ramli, Asyarf Nur; Suaif, ahmad; Yehezkiel, Listra Ginting
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6808

Abstract

Greenhouse is a modern agricultural technology that allows for increased agricultural yields. The purpose of this study was to analyze the thermal distribution in the greenhouse of the Sumatra Institute of Technology (ITERA) in 3 time conditions, namely in the morning, afternoon and evening. The method used is CFD modeling using Solidwork. The dimensions of the greenhouse are 12.5 x 25 x 4.26 m³. The greenhouse is divided into a grid into 20 thermal measurement points separated by 2.5 m. The greenhouse has 2 cooling pads and 2 exhaust fans separated by 12.5 m. Model validation using MAPE and R2. The results of the analysis show that 3 models have valid results with MAPE 10% and R2 0.75 and can continue in the review of thermal distribution. of the 3 time condition models that provide a thermal distribution of 28 - 37 ℃. Morning conditions are hotter than afternoon and evening. Cold air from the cooling pad sucked by the exhaust fan is only able to control an area 50%. So the thermal distribution of the greenhouse needs improvement.
Utilization of Hospital Solid Waste as Paving Blocks Rini, Intan Dwi Wahyu Setyo; Lukman, Fadillah Afdalya; Gunawan, Adrian
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5964

Abstract

A hospital as a health facility has the potential to produce medical waste, which is harmful to the environment, if it is not handled properly and correctly. At Hospital X, infectious medical waste is chopped and sterilized at temperatures above 100oC using a sterilwave to reduce the size of the waste and hand it over to a third party at a substantial cost. This waste has the potential to be used as construction materials, such as paving blocks, which are used as parks in the hospital area. Therefore, this research was conducted to determine the best paving block mix design and composition using chopped medical waste as a fine aggregate substitution. In addition, this research carried out a TCLP test on paving blocks that had the best water absorption to find out whether paving blocks are good enough to strip potential soil contamination. The quality target for paving blocks in this study was to meet class D quality with a minimum compressive strength of 8.5 MPa and a maximum water absorption of 10%. The quality of compressive strength and water absorption was based on SNI 03-0691-1996, and the TCLP test referred to Indonesia Government Regulation Number 22 of 2021. The results showed that the mix design used is 1:5 for the ratio of cement and fine aggregate with an average compressive strength of normal paving blocks of 10 MPa. Whereas paving blocks with a mixture of medical waste with the best absorption were those with as much as 8% substitution of fine aggregate, with an average compressive strength value of 10 MPa. The results of the TCLP test on the best specimens showed that the levels of heavy metals in medical waste paving blocks met the TCLP A quality standards and were safe for use in hospital parks.
Designing A Household Waste ShredderMachine Using The Quality Function Deployment Method Pradana, Fendy Nia; Jakaria, Ribangun Bamban
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6834

Abstract

Household waste, especially inorganic waste, is becoming an increasingly pressing challenge in waste management in the community, which can have a negative impact on the environment if not handled properly. This research aims to design a portable, effective, and efficient household waste shredding machine by developing essential attributes such as automatic, ergonomic, easy to operate, durable, safe to use, low cost, easy to disassemble, not easily damaged, and easy to move. The method used is Quality Function Deployment (QFD), which enables the identification and fulfilment of user expectations through in-depth analysis of the voice of the customer. The results showed that of the attributes developed, the most dominant attributes were safety in use and ease of operation, followed by portability and durability. Meanwhile, users considered attributes such as ease of disassembly and low cost less critical. The resulting machine design is able to fulfil all the criteria set by users. It provides an innovative solution to improve the efficiency of inorganic waste management at the household level to provide convenience, safety, and portability in its use. From the weighting of attribute values, the most dominant order to the last is the attribute of easy to move with a value of 10,542, easy to disassemble 9,404, safe when used 8,821, ergonomic 8,151, easy to operate 6,630, durable 6,248, low cost 5,439, the machine is not easily damaged 5,283, automatic 5,110.
INVERSE DISTANCE WEIGHTED METHODS IN GROUNDWATER MODELLING PONJONG AREA, GUNUNG KIDUL REGENCY, SPECIAL REGION OF YOGYAKARTA, INDONESIA Sari, Avellyn Shinthya
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5982

Abstract

Groundwater modeling is needed to display the underground dimensions of groundwater. The Inverse Distance Weighting (IDW) technique is the choice as the basis for groundwater model analysis because the analysis using this technique remains accurate even though it only uses a few sample points. The groundwater model in Sidorejo Village, Ponjong District, Gunungkidul Regency, Yogyakarta Special Region has a water thickness of between 4.5 – 13.85 meters. With a pore aquifer system, because based on data from field observations and interpretation of geological maps, Sidorejo village, Ponjong District, Gunungkidul Regency, Yogyakarta Special Region is included in the Wonosari formation with geological structures in the form of limestone, reef, calcarenite, calcarenite tuffan. As for the direction of groundwater flow to the west, following the slope of the slope found at the study site. While the results of groundwater quality analysis using the Inverse Distance Weighting (IDW) technique by testing several parameters including the degree of acidity (pH), electrical conductivity (DHL), Total Disolved Solid (TDS), iron (Fe), calcium (Ca) , magnesium (Mg), and calcium carbonate (CaCO3) it can be concluded that all test well samples indicated no contamination because all test parameters were still within normal limits.
Comparative Study on the Kinematic Performance of Front Wheel Drive (FWD) and Rear Wheel Drive (RWD) Vehicles Ismail, Ahmad Yusuf; Zuntion, Reyhan Bahauddin Ramadhan
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6836

Abstract

The automotive industry has continuously innovated drive systems. Among various types, Front Wheel Drive (FWD) and Rear Wheel Drive (RWD) systems are widely used. This research examines the influence of these systems on acceleration and deceleration performance through field tests conducted on public highways. Five speed variations—40, 60, 80, 100, and 110 km/h—were tested for acceleration and deceleration. Results indicate RWD vehicles outperform FWD vehicles in acceleration due to the rear location of the drive wheels, providing superior propulsion. Conversely, FWD vehicles demonstrate better deceleration performance, attributed to shorter braking distances and improved braking efficiency.
Swing and Electrode Diameter Effects on Toughness and Hardness of Stainless Steel 304 MIG Welding Results Alifian, Fahrizal; Setiawan, Eko Agung; Rosidah, Afira Ainur
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5375

Abstract

Welding is one of the commonly used methods for joining metals. One of the welding techniques frequently employed is MIG welding (Metal Inert Gas welding). This type of welding is typically used for joining stainless steel. Consequently, many factors need to be analyzed to achieve optimal welding results. The objective of this research is to investigate the influence of swing variation and electrode diameter on hardness, toughness, and macrostructure from the welded stainless steel 304 using MIG welding. The research results showed the highest toughness test results with a 2.0 mm electrode diameter and a zig-zag swing of 0.459 J/mm2, while the lowest toughness test results were obtained with a 2.6 mm electrode diameter and a spiral swing of 0.201 J/mm2. The highest hardness test results were observed with a 2.6 mm electrode diameter and a zig-zag swing in the Heat Affected Zone (HAZ) at 292.0 kg/mm2, whereas the lowest hardness test results were obtained with a 2.0 mm electrode diameter and a zig-zag swing in the welded metal at 203.6 kg/mm2. The widest HAZ occurred with the spiral swing variation and a 1.5 mm electrode diameter, resulting in a HAZ width of 1.92 mm, while the narrowest HAZ of 1.25 mm occurred with the spiral swing variation and a 2.0 mm electrode. Thus, it can be concluded that the electrode diameter variation affects the results of toughness, hardness, and macrostructure tests.
Implementation of Total Quality Management (TQM) and Malcolm Baldrige National Quality Award (MBNQA) for Work Quality Improvement Syaiin, Moh Nur; Lukmandono, Lukmandono
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6478

Abstract

Performance measurement is needed to improve organizational performance by systematically measuring the level of performance achievement. This is done so that the company can know its position so that improvements can be made which will have an impact on increasing the productivity of the company. PT Esa Solusi Mandiri with the brand name Esaco is a consulting, training, assessment and equipment inspection agency. Esaco needs to improve its performance because the success of a company can be assessed by accurate and precise performance indicators to reflect its competitiveness. The approach used for performance measurement uses the Malcolm Baldrige National Quality Award (MBNQA). This study shows that Esaco's performance is in the average category with a score of 416.17, which indicates that the company is in the early improvement stage in the service sector.
(Cover, Editorial Board, Table of Contents) Jurnal IPTEK, Tim
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cost Benefit Analysis of Energy Retrofitting with the Addition of Ventilation Holes in Middle Low-Income Houshold Buildings Elvarettano, Rhesa Akbar; Hamidah, Nur Laila; Aulady, Mohamad Ferdaus Noor
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5852

Abstract

The current climate change is characterized by an increase in the earth's surface temperature; one of the impacts that is felt quite significantly is the thermal comfort conditions in buildings. This will encourage residents to use air conditioning to provide the required level of thermal comfort. From the results of electricity demand forecasts, from 2017 to 2036, electricity demand will increase by 6.4% annually, dominated by the household sector at 38.49%. Efforts can be made to condition the room's thermal comfort to reduce the AC's operating time. This can be realized through building energy retrofitting, especially in middle-low-income households. Retrofitting will also not require high costs, so it suits middle-low-income households. In this research, retrofitting was carried out by implementing ventilation. It is hoped that ventilation will naturally provide air to specific rooms through air movement and exchange. This study implemented 12 variations in ventilation, namely variations with cross ventilation and non-cross ventilation, then varied the size of the ventilation and the number of ventilations. This research was carried out based on simulations using Computational Fluid Dynamics. After carrying out the simulation, it was obtained that the most significant decrease in indoor temperature was when cross ventilation was applied at night with ventilation measuring 30 cm x 70 cm with a total of 4 vents, namely with a decrease in the average indoor temperature of 1.614C. After that, a cost-benefit analysis was carried out to compare the costs and benefits of a project; a cost-benefit ratio of 1.26 was obtained, where the profits were more significant than the expenditure costs, a payback period value of 0.402 was obtained, or the capital could be returned for five months, and savings were obtained. Electricity consumption costs up to year five amount to IDR 24,340,306.

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